Optimization of Barrel Liner Modification of Ball Mill Based on Discrete Element Method

LI Yunxiao; XIAO Qingfei; GUO Hongchen; LIU Xiangyang; ZHOU Qiang; WANG Xiaojiang

doi:10.13779/j.cnki.issn1001-0076.2023.07.009

2023 Vol. 43, No. 4

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Article navigation > Conservation and Utilization of Mineral Resources > 2023 > 43(4): 43-49

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LI Yunxiao, XIAO Qingfei, GUO Hongchen, LIU Xiangyang, ZHOU Qiang, WANG Xiaojiang. Optimization of Barrel Liner Modification of Ball Mill Based on Discrete Element Method[J]. Conservation and Utilization of Mineral Resources, 2023, 43(4): 43-49. doi: 10.13779/j.cnki.issn1001-0076.2023.07.009

Citation:

LI Yunxiao, XIAO Qingfei, GUO Hongchen, LIU Xiangyang, ZHOU Qiang, WANG Xiaojiang. Optimization of Barrel Liner Modification of Ball Mill Based on Discrete Element Method[J]. Conservation and Utilization of Mineral Resources, 2023, 43(4): 43-49. doi: 10.13779/j.cnki.issn1001-0076.2023.07.009

Optimization of Barrel Liner Modification of Ball Mill Based on Discrete Element Method

1.
Kunming University of Science and Technology. State Key Laboratory of Clean Utilization of Complex Nonferrous Metal Resources, Kunming 650093, China
2.
School of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, China
3.
State Key; Laboratory of Mineral Processing Science and Technology, Beijing 100070, China
4.
State Key Laboratory of Automatic Control Technology of Mining and Metallurgical Processes (Beijing), Beijing 100070, China

More Information

Corresponding author: XIAO Qingfei, 13515877@qq.com

Received Date: 28 March 2023

Publish Date: 25 August 2023

Abstract

Abstract

Aiming at the problems of low energy utilization rate and high grinding steel consumption in the ball mill, the motion state and collision energy distribution of steel balls under different liner structures and liner heights were analyzed based on discrete element method (DEM). The results showed that the structure and height of the liner significantly affected the motion state and energy distribution of particles in the mill. The effect of rough liners (rib liners and double rib liners) on load lifting was stronger than that of smooth liners (single wave liners and double wave liners), but leaving profound impact of steel balls on the liners in the ball mill of rough liners and increasing the wear. Among the smooth liners, the double wave liner had the most reasonable energy distribution, with the lowest 52.10% steel ball−steel ball collision energy, and the highest 21.10% energy utilization rate (the sum of the collision energy of steel ball−ore and ore−ore in the total collision energy of the mill). With the gradual increase of the liner height, the number of steel balls moving at high speed may increase, and the impact of a large number of steel balls on the exposed liner would accelerate the wear. The total collision energy in the mill increased with the expansion of liner height, with the incremental collision energy of steel ball−liner and ore−liner, bringing the highest 21.10% energy utilization rate at 60 mm liner height, indicating that the best liner height at 60 mm. Therefore, the selection of the appropriate liner structure and liner height could optimize the energy utilization of the mill, improve the grinding environment, reduce steel consumption and save grinding costs.
- ball mill /
- liner shape /
- liner height /
- collision energy distribution /
- DEM

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References

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